Magnetic fluid seals have the advantages of zero leakage, long life, simple structure and high reliability, become one most widely used applications magnetic fluids. In this paper, effect evaporation on pressure resistance is studied. terms theory, through theoretical calculation simulation analysis, a method for established. experiments, firstly, five groups control were set up to conduct expe...

‎the object of the present paper is to study spacetimes admitting‎ ‎quasi-conformal curvature tensor‎. ‎at first we prove that a quasi-conformally flat spacetime is einstein‎ ‎and hence it is of constant curvature and the energy momentum tensor of such a spacetime satisfying‎ ‎einstein's field equation with cosmological constant is covariant constant‎. ‎next‎, ‎we prove that if the perfect...

the aim of this paper is to develop a systematic method to analyze the effects of forming parameters on the quality of part formability and determine the optimal combination of the forming parameters for the sheet hydroforming process. in this paper, the effects of four important process parameters namely fluid pressure, friction coefficient at blank/punch interface, gap between die rim block a...

This work proposes a numerical model that incorporates the effect of lubricant inertia on the hydrodynamic pressure distribution, fluid film reaction forces, and the fluid velocity component profiles for finite-length open-ended squeeze film dampers (SFDs). Firstly, the thin film flow equations for the SFD in presence of fluid inertia effects are introduced. Furthermore, a small first-order per...

A laboratory sediment sample is digitized by X-ray computed tomography system to obtain a host matrix of size 100 of porosity 0.282. Flow through the porous medium is studied by an interacting lattice gas model for fluid driven by pressure bias. The bias //(0<//^ 1) is implemented via soft and hard pressure constraints in selecting the stochastic movement of fluid particles. The response of flu...